Megger BD-59093 Offers

Rugged and lightweight, this handheld micro-ohmmeter is suitable for fieldwork, such as substations. Designed for several applications, this micro-ohmmeter is the most commonly used for contact resistance measurements of low-, medium- and high-voltage breakers, bus-bar joints, and other high-current links.

Features

• Delivers up to 240 A to measure resistance of high-current links
• DualGround technology ensures grounding of test object for safe workflow
• Auto range from 1 mΩ to 1000 MΩ
• Ultra capacitor technology allows for high current generation
• Stores up to 190 test results and transfers test data to PC via Bluetooth
• Supplied with Kelvin clamps for carrying out 4-wire Kelvin test
• Handheld and portable, weighing only 2.2 lbs (1 kg)
• Battery powered and rechargeable
• Complies with IEEE and IEC standards

Applications

• Circuit breaking testing
• Testing of bus-bar
• Switches
• Disconnecting devices
• Safety ground connections
• Welding points
• Fuses
• Cables

Both sides grounded

Within electrical power utilities, switchgear owners and service companies, there is an increased emphasis on efficiency of operations, maintenance and service levels. There is an increased emphasis on health, safety, and environmental compliance. Experience has also shown demands for shorter time periods for testing, while the switchgear is less and less available to be taken out of service.

Many utilities require safety grounds to remain in place during station outages, therefore, it was designed with this field safety constraint in mind. DualGround means that the test object will be grounded on both sides throughout the test giving a safer, faster and easier workflow. Minimum time shall be spent in the substation and focus shall be on the test rather than the equipment.

Instrument front view

1. Current output terminal (-)
2. Current output terminal (+)
3. Display
4. Ground (earth) terminal
5. Keys for navigation and to make settings in the display
6. TEST-button
7. Stand-by/Wake up (Press shortly to toggle)
8. Clear log (Press and hold for 5 seconds)
9. Function selector
10. Connector for the voltage (–) sense lead
11. Connector for the voltage sense (+) lead and the trig function
12. Connector for the battery charger
13. Battery charger indicator

The Kelvin probes are used for a 4-wire Kelvin test. This is a way of measuring continuity resistances ensuring all contact and lead resistances are compensated for, allowing a much greater accuracy in measurements. Each Kelvin probe assembly has two probe tips: one tip is for the current generated; the other will measure the very small voltage present.

The Kelvin clamps use the same principle.

Equipment and methods that supports DualGround™ testing are associated with the DualGround symbol. This symbol certifies the use of groundbreaking technology and methods that enables a safe, fast and easy work?ow with both sides grounded throughout the test.